/* 0.当前网站样式重置 */
html {
    font-size: 62.5%;
    --site-width: 100%;
}


body {
    color: #333;
    font-size: 1.2rem;
}
h1,
h2,
h3,
h4,
h5,
h6,
ul 
figure {
    margin: 0;
    padding: 0;

}

li {
    list-style-type: none;
}

a {
    text-decoration: none;
    color: #333;

}
a:hover {
    color: rgb(54, 54, 54);
}
/* 依据父容器等比例缩放 */
img {
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 100%;
}


/* 0-1. 页面容器宽度定义 */
header,
nav,
main,
footer {

    width: calc(var(--site-width));
    margin: 0 auto;
}
/* 0-2. 公共定义 */
.w1200 {
    width: 1200px;
    margin: 0 auto;
  }
  
  .mt10{
    margin-top: 1rem;
  }
  
  .mt20 {
    margin-top: 2rem;
  }
  
  .mt30 {
    margin-top: 3rem;
  }
  
  .fl {
    float: left;
  }
  
  .fr {
    float: right;
  }
/* 1. 页面顶部定义 */
header {
    background: rgb(255, 255, 255);
}
.topline {
    width: fit-content;
    margin: 0 auto;
}
/* 1-1. 顶部导航设置 */
.top_nav {
    display: flex;
    height: 30px;
    color: rgb(0, 0, 0);
    align-items: center;
}

.top_nav .push_right {
    margin-left: auto;
}
.top_nav a {
    color: rgb(255, 255, 255);
    padding-right: 1rem;
}

.top_nav a:not(:last-of-type)::after {
    content: "|";
    margin-left: 1rem;
}

/* 1-2. Logo */
.logo h1 {
    height: 100px;
    ;
}
/* 2.页面导航定义 */
nav {
    background: rgb(17, 166, 177);

}

nav a {
    display: block;
    text-align: center;
    height: 48px;
    line-height: 48px;
    overflow: hidden;

}

nav ul {
    display: flex;
    align-items: center;
    justify-content: space-around;
    width: 1154;

}

nav li {
    flex: 1;
    width: 1154;
}

nav li > a {
    font-family: 宋体;
    text-decoration: none;
    font-weight: bold;
    color: #fff;
    display: block;
    width: 98px;
    height: 48px;
    line-height: 48px;
    text-align: center;
    font-size: 18px;
    width: 1154;

}

nav li:hover > a {
    color: #333;
    background: rgb(17, 166, 177);
}
/* 首页菜单默认显示 */
nav li:first-of-type > a {
    color: #333;
    background: rgb(17, 166, 177);
}
/* 2-2. 导航二级菜单定义 */
nav ul.sub_menu {
    display: none;
    position: absolute;

}

nav li:hover ul.sub_menu {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 98px;
    background: rgb(17, 166, 177);
    z-index: 999;
}

nav ul.sub_menu a {
    font-family: 宋体;
    text-decoration: none;
    font-weight: bold;
    color: #fff;
    display: block;
    width: 98px;
    height: 48px;
    line-height: 48px;
    text-align: left;
    font-size: 18px;
}
nav ul.sub_menu li:hover > a {
    background: rgb(6, 207, 207);
}

/* 3.页面主体定义 */


/* 3-1. 宣传图轮播 */
.banner{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 33.5rem;
    overflow: hidden;
    background: rgba(255,255,251);

}
/*两端边界定义*/
.banner .edge{
    flex:0 0 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1;
    position: relative;
}
.banner .edge a.arrow {
    display: block;
    width: 6rem;
    height: 100%;
    position: absolute;
  }
  .banner .edge a.prev {
    right: 0;
    background: url(../images/slider-arrow.png) no-repeat -18rem 0;
  }
  .banner .edge a.prev:hover {

    background: url(../images/slider-arrow.png) no-repeat -12rem 0;
  }
  .banner .edge a.nest {
    left: 0;
    background: url(../images/slider-arrow.png) no-repeat -6rem 0;
  }
  .banner .edge a.nest:hover {
  
    background: url(../images/slider-arrow.png) no-repeat 0 0;
  }
/*轮播图定义*/
.banner .banner_list{
    flex: 0 0 120rem;
    max-width: 120rem;
    height: 33.5rem;
    display: flex;

}

.banner figure{
    flex:1 0 100vw;
    display: flex;
    flex-direction: column;
    max-width: 100%;
}
.banner figure:first-of-type{
    margin-left: -120rem;
}
.banner figure img {
    max-height: 33.5rem;
  }
.t header {
    display: flexbox;
    background: transparent;
    align-items: flex-end;
    border-bottom: 1px #b2b2b2 dashed;
    height: 2rem;
    padding-bottom: 1rem;
  }
  .t header > img {
    margin-right: 1rem;
  }
  
  .t header > h2 {
    font-size: 2rem;
    font-weight: normal;
    color: #89211b;
  }
  
  .t header > a {
    margin-left: auto;
    margin-right: 1rem;
  }

  .note figcaption {
    color: #000;
    font-size: 1.6rem;
    text-align: start;
    height: 5rem;
    line-height: 4rem;
    font-weight: bold;
  }
  .note section header{
    width: fit-content;
    margin: 0 auto;
  }
  .note  article {
    display: flex;
    justify-content: first baseline;
    height: 50rem;
    width: 464rem;
    overflow: auto;
    font-size: 25px;
  }

.note article ul:nth-of-type {
    flex: 0 0 606rem;
    display: flex;
    align-items: center;
    justify-content: flex-start;
  }
  .note article ul:nth-of-type li {
    width: 29rem;
    margin-right: 3rem;
    background-color: #f7f7f7;
    color: #666;
  }

/* 3.4 专题网站 */
.topic ul{
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden;
  }
  
  .topic li{
    flex: 0 0 rem;
    margin-right: 2rem ;
  }
  
  .topic li img{
    width: 20rem;
    height: 4rem;
  }

  footer{
    height: 11.7rem;
    background: rgba(248, 243, 243, 0.7);
    color: rgb(0, 0, 0);
    font-size: 1.4rem;
    align-items: center;
    display: flex;
    
    
  }
  
  footer address{
    line-height: 4.8rem;
    font-style: normal;

    display: flex;
  }